Computing-machine.



J. N. THORNTON. COMPUTING MACHINE.

APPLlcATloN man Aue.11. 1911.

Patented July 13, 1915.

2 SHEETS-SHEET I FIG. l

INVENTOR:

vkWITNESSE'S: HM

ATToRNE I 1. Nl THORNTON.

COMPUTING MACHINE.

APPucATloN FILED 106.17, 1911.

Patented July 13, 1915.

l Y ATTO Y 1- UNITED sTATEs PATENT oEErcE.

JOHN N. THORNTON, OE `TERsEY CITY, NEwJERsEY, AssIGNoR To .ioHN T. UNDERWOOD,

'f OE BROOKLYN,y NEW YORK.

COMPUTING-MACHINE.

To all whom itmay concern Be it known that I, JOHN N. THORNTON, a citizen of the United States, residing in Jersey City, in the county of Hudson. and State of New Jersey, have invented certain new and useful Improvements in`Computing-Machines, ,of which the following is a specification.

This invention relates to power drives adapted for computing machines, and especially to combined typewriting and computing machines, of the class shown in co-pending applications of Frederick A. Hart, Frank Allard and Fred VF. Main, in which is shown an Underwood-Hanson typewriting and adding machine, in which the numeral keys of the typewriter are caused to set up pins which are subsequently engaged .by a general operator, whereby the' extent of rotation of the dial wheels is determined. The general operator is actuated by an electric motor, and the present improvements relate to means for controlling the motoras well as for controlling its connection to the general operator. Certain features of the invention are also applicable to other machines, vin which a motor is employed in connection with other devices than a general operator.

One of the principal features of the pres- "ent improvements consist`s-1n the provision of` means for closing a circuit through the motor, and connecting it to the computingv mechanism. Not only is the lmotor circuit normally open,/but the motor is also normally disconnected from the computing mechanism.

In carrying out the invention, I preferably employ a self-closing circuit and a self-closing clutch. These self-closing devices are restrained by means ofa latch; and a key at the keyboard, or any suitable device, may be provided for closing the motor circuit, and concomitantly closing the clutch.\ Included in the motor circuit are two primary elements, one in the nature of av bridge, and the other in the'nature of a pair of brushes or contacts; and one of the contacts is normally opposite a gap which is lprovided in the bridge, so that no current iows through the motor, A spring, how

ever, tends to .move one of said prlmary lelements to close the circuit; and this spring,

'normally restrained-by a latch. By de- Specification of Letters Patent.

'lng "akey, the latch is moved, .and the v. i'ng'opfelrates to rotate one of said pri.-`

Patented July 13, 1915.

Application led August 17, 1911. Serial N o. 644,573.

'member in a manner to close the clutch. The

latch aforesaid, however, is arranged to hold said controlling member in clutch-releasing position; but when said latch is withdrawn and the circuit is closed, thereisnothing to prevent the clutch from being closed by the j movement of the motor. At the conclusion ofl said cycle of operations of the computing mechanism, the clutch also is opened, so that the parts resume their normal positions. Y

Certain features of the circuit-closing mechanism are available in other machines in which the motor is otherwise connected to the mechanism than through a friction clutch.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a sectional elevation of an Underwood- Hanson combined typewriting and computing machine, of the -kind' to which the above improvements are applied. Fig. 2 is a sectional side elevation of the circuit and clutch-closing -members, showing them in normal positions. Fig. 3 is a side elevation of a pair of brushes andthe device upon which they are mounted. Fi 4 is a perspective view of a disk, whic is used for supporting and operating a rotary bridge. Fig. 5 is a perspective view similar to Fig. 2, but showingy the latch withdrawn and the circuit closed. Fig. 6 is a sectional front elevation through the clutch mechanism, which. is arranged below theframe of the computing mechanism. Fig. 7 is an elevation of the clutch ring, seen at Figs. 2-

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"ing pins 37b through perforations in the to be engaged and driven by a lug 10 on disk 6. A compression spring 11 is coiled around the hub 4, and adjusted by a nut 12 to determine how much of a load the clutch will carry without slipping.

-A rack 13, forming part of a rack frame, is movable forwardly and backwardly in the base of the adding machine, and pe`r forms the final portion of the computing operation. This rack frame is reciprocated intermittently by the rotating shaft 3, by means of a clutch mechanism; said rack frame being connected to a crank shaft to be driven thereby, and the crank shaft being connected by a worm gearing to said shaft 3, as will presently be set forth.

Upon the rack frame is secured a yoke or carrier 14,'in engagement with which is thel upper end of an arm 15, provided on a cross head 16, which moves forwardly and backwardly, or from left to right at Fi 1, and return so as to reciprocate said rac frame 13; said cross head being carried on a horizontal slide 17, which Works in bearings '18 on a casing 19. This slide is reciprocated by means of a crank 23, fixed on a horizontal shaft 24; said crank carrying a slide block 26, working in a groove 27 in the cross head.

Loose on shaft 24 is a worm gear 30 meshing with a worm 31, the latter Xed on shaft 3, so that the Worm gear or wheel 30 rmay be intermittently rotated. The worm Wheel 30 is connectible to shaft 24 to turn the same whenever it is necessary to reciprocate the rack frame 13 to complete a computing operation; and at the conclusion of said reciprocation, said worm wheel 30 is automatically disconnected from the shaft 24, and the latter comesto a stop, together with the motor by means now to be explained.

Fixed to crank shaft 24 is a cupped member 32 of a clutch. The hub of worm gear 30 is designated as 33. The clutch also comprises gripping rolls 34 to runupon opposite sides of the gear wheel ,hub 33, Fig. 2. These rolls normally occupy pockets 35 in the clutch cup, said pockets having inclined walls against which the rolls may wedge, although the rolls are normally released. The clutch rolls are shiftable between gripping and releasing positions in the pockets 35 by means of a ring 36 fitted upon the gear hub 33 to be independently vrotatable and occupying a position within the cup 32. This ring 36 has cutaways or recesses 36a to receive loosely the balls 34, so as to control the latter. The ball-controlling ring 36 is frictionally connected to the gear hub 33 by means of a double spring 37 secured to the ring by a screw 37a and pressring 36 against the surface of gear hub 33. This device enables the hub to take a fairly strong grip upon the ring, so that the latter always tends to rotate with the hub.

This tendency is in a direction to close the clutch; and hencewhen the motor is ro-v tating there is a constant tendency to close said clutch. Normally however said ring 36 is restrained from causing the rolls to bind; or in other words said ring is normally held in clutch-releasing position. For this purpose thereA is provided a trip pin or latch 40 normally in the path of a lug 41 provided upon the releasing ring 36, said lug 41 projecting through an opening 41 in the clutch cup 32. Whenever the crank shaft 24 is to be clutched to the gear 30, the latch 40 is raised to release the lug 41 to permit the gear hub 33 (assuming the latter to be rotating) to carryv around ,both the ring 36 and the rolls 34 until the latter grip upon theinclined walls of the pockets 35, thereby closing the clutch. The pin 40 is immediately dropped again into the path of lug 41, so that at the completion of a single revolution of the shaft 24, the latter is again unclutched automatically from the worm gear 30. The latch 40 is also employed for the purpose of controlling the motor circuit, closing said circuit, and then opening the same. The circuit" is closed by the upward movement of the latch 40, which withdraws it from the path of the clutchreleasing ,lug 41. When said latch 40 is lifted, a spring 42 in said lug, by pressing against an ear 43 on a disk 44, Fig. 4, imparts to the latter a slight advance rotation; said disk 44 being, for convenience, loosely mounted upon the hub 45 of the clutch ring.

32, F'igQ. Said latch 40 and ear 43 project through an opening 35"L in said cup member 32. This starting forward of said disk 44 is utilized for the purpose of closing the circuit through the motor 1. Upon said disk 44 is carried a circular or disk-like bridge 46, and against the outer face of 46 press yielding brushes or contacts 47, 48

in the form of fingers secured upon a disk-- like support 49 of insulating material and connected by arms 50 to conductors 51, the

latter directly connected -With the motor 1. The tip 52 of the finger 48 restsnormally upon an insulating plug 53 filling the recess 54 in the annular bridge 46; while the other finger 47 is constantly in contact with said bridge, being-so short as to escape said recess 54, as will be understood from Fig. 3.

It will be noticed that the bridge 46 is secured by screws 55 upon the outer face of an insulating disk 56, which is attached in any suitable way to the outer lace of said disk 44, the`members 44, 56 and 46 being rigidly secured together.

. It will now be understood that when the cuit is completed through the latter, and

through the brush or'contact to the motor,V

and hence the latter revolves. The revolution of the motor, as already explained, turns the lclutch-controlling ring 36 to cause the rolls 34 to bind the gear hub 33 tothe clutch ring 32; and all of these members rotate together until a complete revolution is effected of the gear 30. In the meantime the latch pin 40 is dropped into the path of the ear 43, and arrests the latter when the tip 52 is resting upon the insulating plug 53, and

' hence the motor circuit is broken. The motor however continues to revolve by means of its momentum, and through the friction plugs 37b causes the clutch ring 36 to complete its revolution to the Fig. 2 position, thereby compressing the spring 42. -At the same time, all of the parts are brought to their normal Fig. 2 positions, the balls 34 becoming unclutched from the cup 32 substantially as shown. The motor, by reason of its momentum, may continue to rotate It will be seen that, although the motor lby the latch 40 that also controls the motor circuit.

The rack frame 13 is caused to reciprocate `after the numeral keys of the typewriter havey been operated to set up a' number. This rack frame operates to turn the computing Wheels to different extents, depending upon the key operated. In some cases, the described clutch is operated after 'each number is written on the typewriter. There is shown a special key or handle to operate said clutch, and cause a reciprocation of the rack frame, this special key being substantially the same as shown in'pending application of Frederick A. Hart No. 607,925, filed February 11, 1911. Said key is designated as 57, and is mounted on a stem 58 pivoted at its lower end to a lever 59 fulcrumed at 60 upon the machine frame. Said lever in turn, depresses a cross lever 61 which is pivoted at 62 to the framework, and at its other end engages a notch 63 formed in the top of the trip pin or latch 40, so as to cause'and controlthe up and .down movement o f said latch, whereby the `clutch is caused to open and close. De-

pression of thekey 57 carries down the lever 59; the latter rocks the lever 61 about its fulcrum 62, the other end'` of the lever lifting the latch 40 away from the clutch dog 41 and the bridge gear 43. The operator then immediately releases the key 57, which is retilrned to normal position by a spring 69. The lever 61 has a returning spring 62a.

The typewriter includes the usual set of type-operating keys, .including 'alphabet keys and also including numeral keys 88 mounted on levers 8,8a and connected by bell cranks 89 to type bars 90, which are thrown back against a platen 91 mounted on a carriage 92.- The carriage is power-driven, as usual, and has 'a rack 87 meshing witha pinion 86, connected with an escapement wheel 85, the latter controlled by dogs 84, operated by a universal bar 83which is actuated by the type bars, so that whenever any type key is actuated, the carriage 92 is caused togfeed a letter space.

Fastened at the back of the carriage 92, are brackets 93, carrying a rack 94, to receive adjustable cams or tappets 95. Whenever any tappet, during the travel of the carriage, passes beneath the set o-f jacks 96, it raises the forward ends of the jacks in succession, turning each on its pivot 97, and

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depressing its rear end to press down the corresponding one of a set of wires 98. These wires are connected at their lower ends to levers 99 on a fulcrum rod 100. Each lever 99 raises one of a set of linkages 101, each llinkage having a pin 102 tolft the rear end-of a rack 103,-the forward end of which meshes with a pinion 104 connected -to a computing wheel 105. Each rack carries aset of pins 106, and one of these is depressed by theoperated type key 88; each key having a stem 110, for this purpose, to depress a. crank 112, fast to a shaft 113, which is connected to a linkage 114, to depress one of the pins 106 upon the lifted` rack bar 103; there being one linkage 114 for each key, each linkage being in position to depress a corresponding pin 106 on whichever rack bar is lifted, as set forth in said applica-tion. After the keys 88 are ma.- nipulated to write a number, and the corresponding racks 103 accordingly elevated as the paper carriage feeds along, and certain pins 106 thereon depressed, there must be caused a reciprocation of the rack frame 13. This frame usually includes a pair of arms connected by a transverse horizontal bar 116, which is in position to engage all the displaced pins 106, and to give corresponding forward endwise movements to their racks 103, thereby turning the computing wheels 105 accordingly; the return movements of the racks not turning said wheels, however, because of a pawl-and-ratchet connection (not shown) between said wheels and their drive pinions 104. Pinions 106a meshing withA racks 13, are also in mesh with ,segments 116b fixed on rock shaft 116,

and if desired said rack frame 13 maybe manually reciprocated by said rock-shaft 116c when the arm 15 is disconnected from the computing mechanism.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination of the machine proper, a motor for driving the same, a clutch between the motor and theJ machine, normally remaining ineffective, but adapted to be made effective when the motor is turning, a controlling device for said clutch,- .and means for concomitantly starting and stopping the motor and operating said controlling device for connecting and disconnecting said clutch.

2. The combination of the machine proper, a motor for driving the same, a clutch between the motor and the machine, normally remaining ineffective, but adapted to be made effective when the motor is turning, a controlling device for said clutch, and means for concomitantly starting said` motor and operating said controlling device for connecting said clutch, so as to concomitantly connect said machine to be clutched into driven relation with the motor and excite the motor to action. i

3. The combination of the machine proper, a normally silent motor for driving the same, a normally open clutch between the motor and the machine, 'but adaptedV to be closed when the motor is turning', a controlling device for said clutch, and a common means for operating said device for r closing said clutch and starting said motor.

4.o 'lhe combination of the machine proper, a motor for drlvmg the same, a clutch between sald motor and said machlne, said -motor having a normally open'circuit, means tending to close said circuit, a latch restraining said closing means, means operated :from said -machine for withdrawing said latch to permit said circuit-closing means to operate, means dependent on the movement of the motor for closing said clutch, and vmeans for returning said latch to normal position to effect the opening of the circuit and adapted to release said clutch.

- 5. The combination of the machine proper,-

a normally silent motor for driving the same, a'clutch between said motor and said machine, said motor having an open circuit, means dependent on the movement of the motor for closing said clutch, means including a spring tending to close said circuit,

` I a latch restraining said closing means,

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said machine having a key connected to withdraw said latch so as to permit said ircu'it-closingand clutch-closing means to eoperat..

.The-combination of the machine proper, a 'jnormally silentmmotor for driving the same, said motor having an open circuit, a clutch between said motor and said machine, means dependent on the movement of the motor for closing said clutch, means including a spring tending'to close said circuit, a latch restraining said closing means, said machine having a key connected to withdraw said latch so as to permit said circuit-closing means to operate, means for returning said latch to normal position to effect the opening of said circuit and the release of said clutch, and means dependent upon the operation of said motor for retensioning said spring.

7 The combination of the machine proper, a normally silent motor for driving the same, said motor having a normally lopen circuit, a clutch between said motor and said machine, means dependent Von the movement of the motor for closing said clutch, means tending to close saidcircuit, said closing means including a revoluble device, a connection between said revoluble device and said motor permitting the latter vice, a latch restraining said closing means,

means operable from said machine proper for withdrawing said latch to permit said circuit-closing means to operate, and means for returning said latch to nprmal position to effect the opening of the circuit.

9. The combination of the machine proper, a motor for driving the same, said motor having a normally open circuit, so as to be normally silent, a circuit-closing means including, as two primary elements, a bridge and a pair of contacts or brushes, one of said primary elements mounted for revolution with said motor and one of said brushes normally opposite a break in said bridge, whereby the motor circuit is normally open, and means controllable from said machine proper to effect a relative movement between.said primary elements to close the circuit.

10. The combination of the machine proper, a motor for driving the same, said motor having a normally open circuit so as to be normally silent, a circuit-closing means for said motor including, as two primary elements, a bridge and a pair of contacts or brushes, one of saidv primary elements mounted for revolution with said motor and mbreak in said bridge, whereby the motor circuit is normally open, means controllable from said machine proper to eii'ect a relative movement between said primary elements toclose the circuit, and said primary elements coperating to keep the circuit closed during substantially an entire revolution of the revolving primary element, and.

means to arrest the revolving primary element when it again reachesnormal circuitbreaking position.

11. The combination of the machine proper, `a motor for driving the same, said motor having a normally open circuit so as to be normally silent, circuit-closing means including, as `two primary elements, -a bridge and a' pair of contacts or brushes, one of said primary elements mounted for revolution with said motor and'one of said brushes normally opposite a breakin said` bridge, whereby the motor circuit is normally open, means controllable from said machine proper to effect a relative movement between said primary elements to close the circuit, a slip connection or friction device to connect said revolving primary element to said motor, and means to arrest the revolving primary element when it again reaches normal circuit-breaking po-l sition.

12. The combination of the machine proper, a motor for driving the same, said motor having a normally open circuit so as to be normally silent, primary elements`one of which comprises a pair-.of brushes and the other of-which comprises 'bridge to be engaged by said brushes, onef said primary elements being included in said circuit, said bridge having a gap normally opposite .one of said brushes whereby said circuit is normally open, a spring normally tending to move one ofl said primary elements to close said circuit, means restraining said last-mentioned primary element, means operable from said machine proper to withdraw said restraining means, one of said primary elements having a slip connection with said lmotor to revolve therewith, and-means whereby said restraining means may be returned prior to the conclusion-of the cycle of operations'of the maproper, a motor for driving the same, said motor having a normally open electric circuit so as to be normally silent, a pair of brushes, abridge in said circuit to be engaged by said brushes, said bridge having a gapnormally opposite one of said brushes whereby-said circuit is normally open, a springl normally tending to move said bridge to close said circuit, a latch for restraining said bridge, a clutch controlled by said bridge and between said motor and said machlne comprising a member adapted to drive said bridge by said spring, and means proper for lmg a gap normally opposite one of said brushes, whereby said circuit is normally open, a spring normally tending to move the bridge to close the circuit, a latch to restrain saidv bridge, means controllable from said machine proper to withdraw said latch, a clutch controlled by said bridge and between said `motor and said machine comprising a member adap ed to drive said bridge by said spring, an means-'automatically returning said latch to its normal posil tion in the path of said brid e.

15. The combination o proper, a motor for driving the same, said motor having a normally' open circuit so as to be normally silent, a pair of brushes, a-

bridge in said circuit to be engaged by said brushes, said bridge having a gap normally opposite one of said brushes, whereby said clrcuit is normally open, a clutch between said motor and said machine comprising'a dog having a slip connection with said motor, a spring between said dog and said bridge normally tending to move said bridge to close said circuit, a latch to restrain said dog and said bridge, and means controllable fro said machine proper to withdraw said latc 16. The combination of the machine proper, a motorfor driving the same, said motor having an electric circuit normally open so that saidwmotor will be normally silent, a shaft revoluble by said -motor 'and connected to drive said machine, a collar on said shaft, a friction device between said collar and said shaft, a dog on said collar, a spring having a bearing on said dog, a

bridge movable independently of said dog.

and of' said shaft, an ear on said bridge,

said spring having a bearing on said ear, a

latch in the p-ath of said ear to holdsaid spring under tension, means operable from said machine proper to release said latch,

and a pair of brushes t`o engage said bridge,

one 'of said brushes being. normally opposite a gap in said bridge, said bridge being movable` by said spring to a position to be engaged by said'last-mentioned brush.

17. The combination of the machine proper, a motor for drivingthe same, said the machine motor having a normally open, self-closingl electric circuit,- a normally open, self-closing clutch between said motor and said machine proper, meansnormally 4restraining said circuit and said clutch from closing, and means controlled from said machine proper to withdraw `said restraining means.

18. lThe combination of the machine proper, a motor for driving the same, a normally open, self-.closing electric circuit for said motor, a normally open, self-closing clutch devicev between said motor and said machine proper, means normally restraining said circuit and said clutch device from closing, means controlled from said machine proper for withdrawing said restraining means, and means to return said withdrawing means to normal position.

19. The combination of the machine proper, a motor for driving the same, said motor having a normally open, self-closing electric circuit, a normally open, self-closing clutch device between said motor and said machine, means normally restraining said circuit and said clutch device from closing, means controlled from said machine proper Afor withdrawing said restraining means, means to return said withdrawing means to normal position, and means dependent upon the revolutions of the motor for completing the cycle of operations of said machine and opening the clutch and circuit.

20. The combination of the machine' proper, a motor for driving the same, a normally open, self-closing circuit for said motor, a normally-open, self-closing clutch device between said motor and said machine, said circuit and said clutch device including a part dependent upon the rotation of the motor to effect the closing of the clutch device, means normally restraining said circuit and said clutch device from closing, and

means operable from the machine properfor withdrawing said restraining means.

21. The combination of the machine proper, a motor for driving the same, a normally open electric circuit for said motor, a normally open clutch between said motor and said machine, a single latch for controlling the closing of both said clutch and said circuit, a key for said latch, and means whereby said latch opens both said circuit and said clutch and arrests said machine.

22. The combination of the machine proper, a motor for driving the same, a circuit for said motorv normally open, a normally open clutch between said motor and said machine, means to close said circuit, means dependent upon the revolution of said motor for closing said clutch, and a latch removable tol close the circuit and adapted to simultaneously open said circuit and arrest said machine.

23. The combination of the machine proper, a normally silent motor for' driving the same, a clutch between said motor and said machine, a motor-driven shaft, a collar loose on said shaft and forming a part of said clutch, a slip connection provided between said collar and said shaft, a clutchl roll controlled by said collar, a member having a clutch wall converging toward the periphery of said shaft to cause said roll to bind upon said shaft, means for restraining said collar from turning with said shaft, and vmeans controlled from said machine proper for withdrawing said restraining means.

24. The combination of the machine proper, a motor for driving the same, said motor having a normally open circuit, means tending to close said circuit, a latch restraining said closing means, means operable from said machine proper to permit said closing means to operate, means for returning said latch to normal position to effect the opening of said circuit, an automatically closing and opening clutch between said motor and said machine operated by said latch, and means dependent to effect relative movement between said primary elements to close the circuit, and an automatically closing and opening clutch between said motor and said machine.

26. The combination of the machine proper, of a motor for driving the same, said motor having a normally open electric circuit whereby said motor is normally silent, an automatically closing and opening -clutch between said motor and said machine,

a pair of brushes, a bridge in said circuit to be engaged by said brushes, said bridge having a gap normally opposite one of said brushes, whereby said circuit is normally open, a spring normally tending to move said bridge to close said circuit, a. latch for restraining said bridge, said clutch between said motor and said machine comprising a member adapted to drive said bridge by said spring, and means controllable from said machine proper for withdrawing said latch.

27. The combination of the machine proper, a motor for driving' the same, an electric circuit for said motor, a shaft revoluble by said motor and connected to said machine, a ring or collar on "said shaft, a friction device for said clutch between said .collar and said shaft, a dog on said collar,

i a latch in the path of-said earto hold said spring under` tension, means controllable from said machine proper for releasing said latch, Aa pair of. brushes -to engage said bridge, one of said brushes normally opposite a gap in said bridge, said bridge being movable by said spring to a position to engage said last-mentioned brush, and an automatically closing and opening clutch between said motor and said machine proper.

28. The combination of the machine proper, a motor for driving the same, said motor having a normally open circuit, a normally open clutch between said motor and said machine, means tending to close said circuit, means dependent on the movement of the motor for closing said clutch, a latch restraining said circuit-closing means, means operable from said machine proper for withdrawing said latch to permit said clutch to close and said circuit-closing means to operate, and means for returning said` latch to normal position to effect the'opening of said circuit. l

29.' The combination of the machine proper, a motor for driving the same, said opening ofv said circuit and the opening of said clutch.

30. The combination o fv the y machine proper, a motor for driving the same, said motor having a normally open circuit, so asto be normally silent, a normallyopen clutch` between said motor and said machine proper, means including a spring tending to close said circuit, means dependent on the movement of the motor for closing said clutch, a latch restraining said circuit-closing means, said machine proper having a key connected to withdrawsaidlatch so as to permit the closing of said circuit and said clutch, means for returning said latch to normaly position to eiect the opening of said circuit, and means dependent upon the operation of said motor for retensioning said spring.

31. The combination of the machine proper, a motor for driving the same, said motor having a normally open circuit, a

normally open clutch between said motor and said machine proper, means tending to closev said circuit, means for closing said` clutch including a revoluble device and a clutch roll engaged thereby, a connection between said revoluble closing device and said motor permitting the latter to rotate independently of the closing device, a latch restraining both of said closing means, and means operable from said machine proper for withdrawing said latch to permit thc closing of said circuit and said clutch.

32. The combination of the machine proper,'a motor for driving the same, a normally open circuit for'said motor, a normally open clutch between said motor and said machine proper, means tending to close said circuit, means for closing said clutch, said circuit-closing means including a revoluble device, a frictional or slipping connection between said revoluble closing dcvice and said motor, a latch restraining said circuit-closing means, means operable from said machine proper for withdrawing said latch to permit the closing of said circuit, said clutch including a friction roll controlled by said revoluble device, and means for returning said latch to normal position to effect the opening of said circuit.

33. vThe combination of the machine proper, a motor for driving the same, said motor having a normally open circuit so as to be normally silent, a normally open clutch between said motor and said machinel proper, circuit-closing means including, as two primary elements, a bridge and a pair of contacts or brushes, one of said primary elements mounted for revolution with said motor and one of said brushes normally opposite a `break in said bridge, whereby the motor circuit is normally open, means controlled from said machine proper to effect a relative movement between said primary elements to close said circuit, and means for -concomitantly closing said clutch.

34. The combination of the machine proper, a motor for driving the same, said motorhaving a normally open circuit so as to be normally silent, a normally open clutch between saidmotor Aand the machine proper, circuit-closing means including, as two primary elements, a bridge and a pair of contacts or brushes, one of said primary elementsmounted for revolution with said motor, clutch-closing means controllable by said revolving primary element, one of said brushes normally opposite a break in said bridge, whereby sald motor circuit Vis nor-- mally open, means controlled from said machine proper to effect a relative'movement betweensaid primary elements to close said circuit and simultaneously close said clutch, said primary elements cooperating to keep said circuit closed during substantially an entire revolution of the revolving primary element, and means to arrest the revolving 'primary element to break the circuit and open the clutch. l

35. The combination of the machine proper, a motor` for driving the same, said motor having a normally open circuit, a

normally open clutch between said motor and said machine proper, circuit-closing means including, as two primary elements, a

bridge and a pair of contacts or brushes, oney of said primary elements mounted for revolution with said motor, clutch-closing means controlled by said primary elements, and one of said brushes normally opposite a break in said bridge, whereby said motor circuit is normally open, means controllable from said machine proper for effecting a relative movement between said primary elements to close both the circuits and the clutch, a slip-connection or friction device to connect said revolving primary element to said motor, and means to I-larrest the revolving primary element when it again reaches normal circuit-breaking position to open both said circuit and said clutch.

36. The combination of the machine proper, a motor for driving the same, a normally open clutch betweenv said motor and said machine p'roper, said motor hav- .ing a normally open electric circuit including primary elements, one of which comprises a pair of brushes and the other of which comprises a bridge to be engaged by said brushes, said bridge having a gap normally opposite one of said brushes whereby said circuit is normally open, a spring normally tending to move one of said primary elements to close said circuit, means to restrain said primary element, means operable from said machine proper forY withdrawing said restraining means, one of said primary elements having aslip-connectionl to said motor to revolve therewith, meafnsfo'r concomitantly closing said clutch,l'and`means' whereby said restraimng means maybe returned prior to the conclusion of the cycle of operations of said machine proper to a position to intercept the revolving primary element and tension said. spring.

37.` The combination of the machine proper, of a motor for driving the same, said motor having an electric circuit, a normally open clutch between said motorfand said machine proper, a pair of brushes and a bridge in said circuit, sfaid bridge having a gap normally opposite one of said brushes, whereby said circuit is normally open', a spring normally tending to move said bridge to close said circuit, a latch to restrain said bridge, said clutch between said motor and said machine including a member adapted to drive said bridge by said spring, and means controllable from said machine proper for withdrawing said latch and conp comitantly closing said clutch.

38. The combination of the machine proper, of a motor for driving the same, said motor having an electric circuit, a normally open clutch' between said motor said latch, means where y starting the motor v.

effectsv concomitant closing of said clutch, and means for returning said latch to normal position in the path of said bridgeand concomitantly open said clutch.

39, The combination of the machine proper, a motor for driving the same, a train of gearing between said motor and said machine including a normally openy clutch, said motor being normally silent, a do connected to revolve with said clutch an normally holding said circuit open and said clutch released, and means Icontrolled from said machine proper for releasing said dog for concomitantly starting said motor and connecting said clutch so as to connect said machine in driven relation with said `rnotor at. the same time that said motor is excited to action.

40. The combination with a machine having a reciprocating portion, of a clutch comprising a member adapted to drive said machine, a pitman connected to said member of said clutch and said reciprocating portion, a motor for driving said machine by said clutchkmeans whereby said clutch automatically breaks the power from said motor when the clutch is released and connects the power to said motor when the' clutch is closed, and a friction slip clutch between said motor and said first-named clutch, adapted to slip when the said motor attemptstW-urive said 'pitman through an overload.

4l. The combination with a motor and a normally open circuit for driving it, of atrolled latch adapted to coperate with said' dog to hold the clutch open, means whereby said circuit is closed when said lkeycontrolled latch is withdrawn, means whereby said clutch is closed when said circuit drives s aid motor, and a safety slip clutch between said first-named clutch and said motoi adapted toyslip .when said motor attempts to,4

drive saidA reciprocating member through an overload.

JOI-IN N. THORNTON.

Witnesses:

PAUL ZiRow,

GLnNrmLD S. YOUNG. 

